Remove NodeSource repo from Travis build (#1891)
Remove NodeSource repo from Travis build (#1891)

I don't think we need this any more
lawliet89/yarn,onemen/yarn,seripap/emojiless-yarn,kasperlewau/yarn,suitupalex/yarn,CHECK24/yarn,lawliet89/yarn,ConAntonakos/yarn,andreypopp/esy,ConAntonakos/yarn,joeyespo/yarn,andreypopp/esy,bsansouci/esy,mvestergaard/yarn,mgcrea/yarn,joeyespo/yarn,bsansouci/esy,andreypopp/esy,suitupalex/yarn,seripap/emojiless-yarn,CHECK24/yarn,dguo/yarn,mourner/yarn,kasperlewau/yarn,mourner/yarn,mgcrea/yarn,onemen/yarn,bsansouci/esy,mvestergaard/yarn,dguo/yarn